Fountain-pen



(No Model.)

D. C. DEMAREST.

FOUNTAIN PEN. 8

No. 340,865. Y Patented Apr. 27.1886.

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Attorneys,

UNITED STATES PATENT Ormea DEVITT C. DEMAREST, OF DENVER, COLORADO.

FOUNTAIN-PEN.

SPEGIFIGATION form-ing part of Letters Patent No. 340,865, dated April 27, 1886.

Application tiled August E22, 1885. Serial No. 175.073. (No model.)

To @ZZ whom it may concern.-

Beit known that I, Dnwrr'r C. DEMAREsT, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented new and useful Improvements in FountailrPeus, of which the following is a specification., l

I have improved the iountain-pen in the ink-feeding parts, so as to cheapen the construction of the pen and adapt it for use with the ordinary pens now in use, so that a coarse or a fine pen may be used, as desired. I use a removable ink-tube to supply the pen from the handlereservoir, so as to forni an extension of the latter, and I provide it with an ink-supplying aperture, an air-vent, and a string feeder to conduct the ink to the point of the'pen from the supplying-aperture. The relation of the string feeder to the ink-supplying aperture and to the air-vent is such as to regulate the supply of air to regulate the iiow of the ink -from the ink-tube. The inktube is provided with bands, which may serve solely to regulate the area of the ink-aperture and to render the string feeder adjustable. The ink-tube is provided with an interior stem having a stopper with au air-vent to admit atmospheric pressure and prevent air-bubbles from accumulating within the inktube and cause them to. pass up along the stem in the tube into the handle-reset` voir, while the stem of the stopper serves to conduct the ink from the handlereservoir into and down the inktube. The removable ink-tube as an extension of the handlereservoir, having the inksupplying aperture and the air-vent, is the primary feature of :ny invention, whether provided with the string feeder or used without it.

Referring to the accompanying drawings, Figure l represents a longitudinal section of a fountainpen embracing my improvements.

Fig. 2 shows the removable ink-tube without the string feeder and bands. Fig. 3 shows the same with the string feeder and bands. Fig. 4 is a section of the same. Fig. 5 shows the stemmed stopper of the ink-tube; Fig. 6,'an end View of the inletube; Fig. 7, a similar view with the pen-holder in place; Fig. 8, an enlarged view of the ink-tube, screwsection, and pen-holder.

pen when its holder l is screwed upon the 6o screw-section b, which also screws within the open end of the hamlle-reservoir. lhe inktube c is about onelonrth the arcaol' the handle-reservoir and forms the means of connnunication between it and the pen. joining of the two tubes or ol the ink-tube with the handle or barrel screw section -b there is formed in its outer end a space, e, outside of the ink-tube, io receive any leakage from the joining ot' the tubes and allow it Lo pass oft' down the inner w-.ill ofthepeirholderl' or upon the outer wall of the ink-tube to the peu. The ink-tube might, however, be fitted tightly directly within the open end of the At the handle-reservoir; but, however connected,

inksupplying aperture, and is near the 8o end of said tube, and back of it a short distance is au airvent, g,whieh l prefer to make oblong across the tube, while the ink'supply ing` aperture I prefer to make about ouesixteenth of an inch in diameter. XVheu thepen 8 is adjusted for use, the outer end of the inkl tube will be sufficiently above the point of the pento be out of the way in writing; but the 1 ink-tube is not designed to touch the pen, and the apertures in thc ink-tube arc next the concave side of the pen. The ink-tube is prvided with an encircling band, one for each aperture, the inner oneLh, as a means for adjusting the area of the airvent g, and thereby regulate the flow ofthe ink from its aperture f,while the outer one, e', serves as a holder for a string, j,which,when used, extends from the ink-supplying aperture to the point of the pen, and lies between the pen and the inktube. xoo

Instead of making the band h serve to regulate the area of the airvent, it may be made like the outer band, and serve only to connect the string, which in such case will extend across the two apertures, as in Fig. 3, in the ink-tube, and while taking the ink from the lower aperture by capillary attraction will serve to regulate the area of the air-vent by .turning the band h to one side or the other, and thus move or twist the cord more or less over the air-veut, and thereby increase or diminish the flow of the ink from the lower aperture. Vhen the upper band is adjusted so that the string will lie over and thereby nearly close the air-vent, it will convey the ink to the string over the air-vent, so that when the string is well saturated and the pen well supplied the string will so cover the airvent as to prevent the flow of the ink from the lower aperture until the supply in the string is nearly used, when, by the act of writing` and the partial uncovering of the air-vent by the dryness of the string, the air-vent will thereby admit air, and the ink will again How and iill the string, so as to supply the pen. In this way the pen will be supplied and the iiow regulated; but, as I have already stated, I may dispense with the string as a means for regulating the air-vent, and use a regulatingband, so that it can be turned as a valve to regulate the area of the air-vent to maintain a const-ant ilow of the ink from the lower aper` ture when using the pen. In this case the lower band merely serves as a holder for the string, which may be Single or double, while the upper band may serve, as stated, to regulate the area of the air-vent, or to serve only as the cord-holder when the latter is extended over the air-vent. The upper one of these bands may be made to iit the interior of the penholder, and thus support the latter while writing, as shown in Fig. l.

As the i11k-tubesupply aperture f is liable to be rendered inoperative by the accumulation of airbubbles within the tube at such aperture, I provide against such contingency by inserting a stemmed stopper, It, into the tube from its outer open end, and make an air-vent, .'11, in the stopper, which is placed just in front of or at the outer side ol' such aperturef, while the stem Z extends up to the inner end of the tube and serves to conduct the ink down into the tube lfrom the handlereservoir. YVhen the pen is turned point down, as in writing, the inl: is suspended from the upper end of the ink-tube by atmospheric pressure. Vhen the pen is reversed and the point is turned up, the air in the reservoir is relieved of the weight of the ink, and contract-s, and in contracting it draws in some air, so that when the pen is again turned point down, as in writing, too much ink would be forced out onto the point of the pen, if there were not a place provided to catch and hold the surplus, and this provision is the space s between the end of the tube which conveys the ink and the stopper. The ink l that may leak or pass through the stoppervent a is received into the space s at the lower open end of the tube, and passes out to the point of the pen.

The string feeder is made of cotton or yarn, and it is best to double it.

The stemmed stopper is preferably made of rubber, and is held in place by friction. Its

stein may be made of silver wire.

The string band holders may be made of silver or rubber.

Referring to the ink-feeding tube, I have stated that it passes through the screw-section b and is closely fitted therein, so as to maintain a proper relation with the pen and adapt it for use with the ordinary pens now in use; and it will be understood that for this purpose the ink-feeding tube is adjusted into or out of the reservoir to suit long fine pens or short stub-pens.

I claim- 1. A feed-tube open at both ends and having two side apertures, f and g, one above the other, both located between the pen and the reservoir holder, in combination with the pen-holder, whereby to supply ink to the pen and air to the reservoir, substantially as described.

2. In a fountainpen, the ink-supplying tube e, having the side apertures, f and g, below the closed end of the reservoir, in combination with a holder for the pen and a feedstem, Z, located within the feed-tube, having an air-vent, a, substantially as described.

3. The combination, with the reservoir and ink-tube having the side apertures, f and g, of an ink-feeding device consisting of a fibrous conductor connecting said apertures outside of said inletube, substantially as described.

4. The combination, with the feed-tube of a fountain-pen, having two side apertures, f and y, one above the other, of an ink-feeding device connecting the said apertures outside of said ink-tube, and a feed-stem within said feed-tube, having an air-vent, a, at its lower end, substantially as described, for the pur pose specified.

5. The combination, with the reservoir and a pen-holder. of the ink-feeding tube having a sliding adjustment into said reservoir, and a side ink-supplying aperture, whereby to allow for the use of pens of different lengths, substantially as described.

(i. rlhe combination, with the handle-reser- IOO voir and ink tube provided with ink outlet and air-vent, of an ink-feeding device constructed to supply the pen-point with ink from said tube by capillary attraction, and an adjustable band for regulating the flow of air` through said aperture, substantially as4 specified.

7. The combination, with the ink-tube having ink-outlet and airvent, as described, of the stemmed stopper, having a vent, inserted in said tube, substantially as and forthe pm" In testimony whereof I have hereunto set pose specied. f my hand in the presence of two subscribing 8. The combination, with the ink-tube havwitnesses.

ing ink-outlet and air-vent, of the string o1' DEWITT C. DEMAREST. 5 strings over Suid openings, and the bands Witnesses:

serving the double function of string-holder MARSHALL BUNCE,

and feed-regulator, as seb forth. RODERIC F. HALL. 

